Piston-rod packing.



No. 730,381'. PATENTE) JUNE 9, '1903.

S. J. MADBUX.

PIST'N RGB PACKING. APPLIUAIMN Hman JAN. a, 1903.

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Patented June 9, 1903.

PATENT OFFICE.

SAMUEL JOHN MADDOX, OF CHICAGO, ILLINOIS.

msroN-Ron PACKING.

SPECIFICATION forming part of Letters'Patent No. 730,381, dated J' une 9, 1.903. Application filed January 43, 1903. Serial No. 137.676. (No model To zr/Z whom it rmty concern:

Be it known that I, SAMUEL JOHN MADDOX, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Piston-Packing; and I*A do declare the following; to be la full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the saine, reference being had to the accompanying drawings, and to the letters and iigures of reference marked thereon, which form a part of with the piston in the cylinder; otherwise biting and impingement would result, largely interfering with the true and economic working of the engine.

To overcome this and other difficulties is the object of myinvention; and to this end it consists in locating Within the gland `a horizontally and laterally moving packing and in combination therewith and forming a part thereof anv externally -lubricating packing box or chamber, all of which will be hereinafter more fully described, and pointed out in the claims.

Referring to the drawings hereto attached, Figure 1 'shows a vertical section of my improved packing, also showing gland and a portion of the cylinder-head; Fig. 2, a detail section of the packing-rings and the spring-` clamp perspective; Fig. 3, a perspective view.

of the stning-box ready to be inserted in-the gland of the cylinder-head.

In the drawings, A is the gland, and B the piston-rod. p

C is the packing as a Whole, and D the chamber for holding the lubricating material or oil absorbent, which may be waste, asbestos, plumbago, or any other iiber or any lubricating metal. I The packing-box is cornposed, preferably, of three sections l, 2, and 3. The"central section 2 is rabbeted externally on both edges, as at a, and the sections l and '3 are rabbeted internally, as at b. Then the three sections are placed together, two recesses c and d are formed, one on each side of the central section 2; rlhese lrecesses are made by either casting the packingrings with annular projections or by turning them out in a lathe; but in any case the face of the recesses must betrue and faced to form a ground-joint with the packing-ring, which will be hereinafter described. A

About central in the end sections l and 3 are formed annular grooves f g, open to the bore, which form water-pockets for the purpose of cooling and assisting in lubricating the piston-rod.

In the cylinder end of the gland'is located va conical coilspring H, which bears against the end ofthe stuiiing-box l, and at the inner end of the gland and against the outer end of the packing-ring 3 I locate a ring i, fiat-faced on one side and round or convex on the other, which, working in a Y corresponding 'seat forinedin the inner end of thelubricating-box,

` makes a ball convex or ground-joint bearing steam-tight, so that the packing is held on the rod by means of the coil-spring on one side and the lubricating-box D on the other, the rod of cou-rse passing loosely through the above-described parts.

Within the recesses or chambers d and c I locate my packing-rings proper. These rings snugly iit the piston-rod and are ground steamtight to each other and to the sides of the sections l and 3, respectively. These packingrings are cut in such a manner as to make them flexible and arranged together so as to break joints, and about each pair of these rings I locate an annular spring K, the resiliency of which maintains the packing-rings in adjustment.

The lubricating box or chamber D is secured to the gland by stud-bolts Z and m orby any suitable means, and the lubricating material is inserted through the opening made for the rod. The oil may be poured in through an opening in the box, as seen at n.

At the outer face of the gland I form one IOO , is no leakage.

The operation is as follows: The sections 1, 2, and' 3 being ready, a pair of packingrings provided with the springs are inserted in the recesses or chambers formed between the sections. The coil-spring is then inserted in the gland. The packing or stuiiing box is then inserted after said spring. The ring section il is then placed on the rod. rlhe lubricating-box is then properly iilled with suitable material'and also placed on the rod and on the stud-bolts. The latter being properly screwed up and the oil poured in, the gland is ready for use. Of course the stud-bolts are screwed up sufficiently tight to set all the grou nd-j oints against each other, so that there Thus a simple, cheap, and effective stuiing-box is produced. It will also be noticed that the packing-box is loosely set within the gland, so that the rod is free to operate and adjust itself in any direction, and the ball-joint will permit the rod to automatically adjust itself to any out-of-line irregularities. Thus there is no pinching or unnecessary friction.

It will be understood that changes or alterations may be made without departing from the spirit of my invention to which I consider myself clearly entitled, and therefore do not wish to be confined to the exact form shown and described.

` I-Iavin g thus described my invention and the best form known to me at present for carrying the same into effect, what I claim as new, and desire to secure by Letters Patent, is*

l. The combination in a stuffing-box such as described, of the recessed end andcentral sections, with the packing-rings ground to each other and to the said section, as set forth.

2. The combination in a stuffing-box of the end and central sections recessed as described, and packing-rings ground to each other and to the sections, and springs to hold the said packing-rings resiliently to the end and the fiat and rounded or conical end sections, as described.

3. The Combination in a stuffing-box made up of metallic sections and located within a gland, a spring at the inner end of said gland, a lubricating-box secured to the opposite end of said gland, said box being provided with a concave seat and a corresponding round or convex seated section interposed between the packing and the box as described.

4. The combination of a stuffing-box, a gland and a lubricating-box, of an interposing fiat and convex rounded section between the stuffing-box gland' and the lubricating-box having a concave seat for said convex section as set forth.

5. A stuffing-box composed of a series of sections as l, 2 and 3, having interlapping rabbeted edges, and recesses in their inner sides, packin g-rin gs within said rccesses,com pressed springs around said rings, annular water-pockets in said sections open to the bore thereof, as set forth.

6. The combination of the gland and lubricating-box with the sectional metallic packing located within said gland the interposing section z' having flat and round seats respectively, and the end spring also located within the gland, as set forth.

7. The combination of the gland and lubricating-box, the flat and convex sections i', the gland and lubricating-box being provided with annular grooves in their end faces, and the packing therein interposed between said faces, as described.

In testimony whereof I aiiix my signature in presence of two witnesses.

' SAMUEL JOHN MADDOX.

lVitnesses:

WILLIAM W. UP DE GRAFF, WM. F. A. BOWERS. 

